Ah-ha! - Found this nugget, followed it - and now tentacle_server is up and operational.

[sub]Once the server is installed, the script tentacle_serverd, located at /usr/share/pandora/util can be used to start it automatically every time the sistem boots up.

Before copying the script is a good idea to edit it, and check that the values of the variables PANDORA_SERVER_PATH, TENTACLE_DAEMON, TENTACLE_PATH, TENTACLE_USER, TENTACLE_ADDR and TENTACLE_PORT, located at the begining of the script, are correct.

Extra parameters can be added for advanced configurations, to do so, use the Tentacle server variable TENTACLE_EXT_OPTS.

Now start doing some remote monitoring (ping, checking http port...)
For those checks you don't need to install agents, just create it in the webconsole and add the modules.
It's all in the documentation